Answer:
B
Step-by-step explanation:
Wow matrixes gg
a)[ 1 1 4 ]
[-7 -6 -1 ]
[ 0 4 0 ]
b)[ 15 12 12 ]
[-12 -12 0 ]
[3 6 0 ]
c)[ 7 4 12 ]
[ -18 -16 -2 ]
[ 1 10 0 ]
d) I forgot how to do d lol so heres all I got.
Area of the rectangular yard = 96 square feet
Let us assume the length of the yard = x feet
Width of the yard = x - 4 feet
Then
Area of the yard = length * width
96 = x(x - 4)
96 = x^2 - 4x
x^2 - 4x - 96 = 0
x^2 - 12x + 8x - 96 = 0
x(x - 12) +8(x - 12) = 0
(x - 12)(x + 8) = 0
As the value of length cannot be negative so
x - 12 = 0
x = 12
So
Length of the yard = 12 feet
Width of the yard = x - 4 feet
= 12 - 4 feet
= 8 feet
Then
Perimeter of the yard = 2 (length + width)
= 2(12 + 8)
= 2 * 20 feet
= 40 feet.
So the perimeter of the yard is 40 feet.
We know that Tyson wrote this expression to describe the total amount of points he won in both rounds of a game.
The expression is f+15. Let variable f represent points.
The correct answer is B. Tyson doesn't know how many points he earned in the first round. He knows he earned a total of 15 points in the whole game.
